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New Member

1401 <- cross over cable -> 1401


Is it possible to connect 2 1401's ATM-25 without any ATM Switch ?


Edward So

New Member

Re: 1401 <- cross over cable -> 1401


I'm assuming you are using copper here?

pin cross-overs are:

PIN 1 to 7

PIN 2 to 8

PIN 7 to 1

PIN 8 to 2

pins 3 - 6 are not used.

If fiber, just swap your transmit and receive pairs.

Happy Switching,



New Member

Re: 1401 <- cross over cable -> 1401

How about the config ? Is this OK ? Do I need to set the internal clock ?

Router A

interface atm 3/0

ip address

no keepalive

atm clock internal

pvc 1/35

protocol ip broadcast

Router B

interface atm 3/0

ip address

no keepalive

atm clock internal

pvc 1/35

protocol ip broadcast

New Member

Re: 1401 <- cross over cable -> 1401

Or this config. Which one is right ?

int atm0

ip add

atm pvc 1 0 32 aal5nlpid

map-group 1

map-list 1

ip atm-vc 1 broadcast

Re: 1401 <- cross over cable -> 1401

Both configurations are correct, only difference is that one is according to new command syntax, and other is according to old syntax.


New Member

Re: 1401 <- cross over cable -> 1401

Realy work. THANKS

Cisco Internetwork Operating System Software

IOS (tm) 1400 Software (C1400-NSY-M), Version 12.1(5)T12, RELEASE SOFTWARE (fc1)

TAC Support:

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Mon 04-Feb-02 12:39 by ccai

Image text-base: 0x02005000, data-base: 0x0288EF78

ROM: System Bootstrap, Version 12.0(3)T, RELEASE SOFTWARE (fc1)

ROM: 1400 Software (C1400-RBOOT-R), Version 12.0(3)T, RELEASE SOFTWARE (fc1)

r1401-1 uptime is 28 minutes

System returned to ROM by reload

System image file is "flash:c1400-nsy-mz.121-5.T12.bin"

cisco 1401 (68360) processor (revision A) with 13312K/3072K bytes of memory.

Processor board ID 19783292, with hardware revision 00000002

Bridging software.

X.25 software, Version 3.0.0.

1 Ethernet/IEEE 802.3 interface(s)

1 ATM network interface(s)

System/IO memory with parity disabled

8192K bytes of DRAM onboard 8192K bytes of DRAM on SIMM

System running from RAM

7K bytes of non-volatile configuration memory.

16384K bytes of processor board PCMCIA flash (Read/Write)

Configuration register is 0x2102

r1401-1#sh atm vc

VCD / Peak Avg/Min Burst

Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts

0 1 1 35 PVC SNAP UBR 25600 UP

r1401-1#sh run

Building configuration...

Current configuration : 675 bytes


version 12.1

no service single-slot-reload-enable

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption


hostname r1401-1


logging rate-limit console 10 except errors


ip subnet-zero

no ip finger


interface Ethernet0

ip address dhcp

no ip route-cache

no ip mroute-cache


interface ATM0

ip address

atm vc-per-vp 4096

no atm ilmi-keepalive

pvc 1/35

protocol ip broadcast

protocol ip broadcast



router rip




ip classless

no ip http server



line con 0

transport input none

line vty 0 4





Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:


Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms